Mantteacttteing two-way electric sockets



April 7, 1931. LUDWIG 1,799,596

MANUFACTURING TWO-WAY ELECTRIC SOCKETS Filed Oct. 29, 1929 ZlwvehtozLou/ 5 Ludw/y 33 fir tow;

@AJ MJLWJ Patented Apr. 7, 1931 PATENT oFFms UNETED (STATES LOUISLunwre, or nnoorinrn, NEW Yam;

MANUFACTURING TWO-WAY ELECTRIC SOCKETS hpplication flled October 29,1929. Serial No. 403,201.

of this kind are sold at low prices and that an important item of theirmanufacturing cost is the final assembling of all the parts 10comprising the article. The present invention materially reduces thiscost, besides eliminating certain parts formerly indispensable in theassembling. I

The following description and the ac com- 3L5 panyin drawing of atwo-waysocket assemble in'accordance to the invention will make this savingevident. In the drawing Fig. 1 is a cross-sectional side view of thesocket; f

Fig. 2 is a bottom view taken in the direction shown, by line 2-2, inFig. 1; and 7 Figs. 3, 4c and 5 are,- respectively, a side, front andtop view of one of the threaded metal sockets used in the device.

Referring now to/allthe views, simultaneously, is the body member-whichis madeof any suitable insulating material and consists of two socketmembers 11 and a holvlow plug 12.. Y to The ch'amberltt formed in theplug is separated from the socket chambers by the webs 1a which, exceptfor the rectangular openlugs 15 and the center hole 16, completely coverthe chambers; The plug has two seats 17 out in its upper rim and anexternal shoulder 18.

The threaded metal sockets 19., which are v inserted in the socketchamber, are plainly shown in Figs. 3, t and 5. A tongue or strip 20 issheared from the metal of which these sockets are made and this strip ispassed through one of the rectangular openings 15 formed in thd web 14and the'end is bent over one of the seats 17, as plainly shown in Fig.

cut in the sockets; by these meansthe sockets are correctly located andprevented from rotatm when a lamp or plug is inserted. Y

' A shaped, metalclamp .23 rests on top 1 of the bent ends of thestrips20 and a thread- 1. Lugs 21 are cast on the web and slots 22- ed metalferrule 24 is placed over the end of the plug 12. An insulating washer25 is placed on top of the ferrule and insulating washers 26 are placedinside the sockets 19. All the parts are finally assembled by the bolt27' which is screwed into the doubleended clamp 28. ,The ends of thisclamp effectively hold the sockets 19 against the web It has. alwaysformerly been necessary to secure the sockets against the web byinserting eyelets or other fastening means at the points marked A. It isevident that in the present case these eyelets can be omitted. Thisefiects a considerable saving as the operations of inserting andrivetingthese eyelets are slow and tedious.

Having described my invention and its operation, what I claim as new andwish to protect by Letters Patent is:

1. The process of manufacturing two-way sockets which consists inmoulding an insulating body member consisting of two socket chambers anda hollow plug which is sepa rated from the socket chambers by webs eachof which contains a narrow opening; inserting threaded metal sockets,each formed from a circular blank and so constructed as to provide along connecting strip at its inner end, in the said socket chambers insuch a manner that the connecting strips project through the webopenings and into the hollow plug;

bending the ends of said strips over the edge of the hollow plug;securing the bent ends by all-shaped metal clamp; placing a threadedmetal ferrule over the open end of the plug; placing a double-endedmetal clamp inside the metal sockets; and securing all the parts by ascrew which passes, t rough holes formed in the ferrule and theaforementioned webs and which is threaded-in the .doub1e-.

ended clamp; insulating washers being inserted under the head of thescrew and under the double-ended clamp.

2. The process of manufacturing two-way sockets which consists in makingan insulating body member consisting of two socket chambers and a hollowplug provided at its open end with two oppositely disposed grooves andseparated from the socket chambers by webs each of which contains anarrow opening; inserting threaded metal sockets, each formed from acircular blank and so constructed as to provide a long connecting stripat its inner end, in said socket chambers in such a manner that theconnecting strips project through the web openings and into the hollowplug; bending the ends of said strips over the edge of the hollow plugso as to place them in the grooves formed therein; securing the bentends by placing a U-shaped clamping member thereon; placing a threadedmetal ferrule over the open end of the plug and in electric contact withthe ends of the strips; placing a double-ended metal clamp inside themetal sockets; and securing all the parts by means of a screw whichpasses through holes in the ferrule and in the webs and is threaded inthe double-ended clamp; insulating washers being inserted under the headof the screw and under the double-ended clamp.

3. The process of manufacturing two-way sockets which consists inmoulding an insulating body member consisting of two socket chambers inwhich arev contained locating lugs and a hollow plug which is separatedfrom the socket chambers by webs each of which is pierced by an opening;inserting threaded metal sockets, each formed from a circular blank andso constructed as to provide a long connecting strip at its inner endand slots engageable upon said aforementioned lugs, in said socketchambers in such a manner that the connecting strips project through theweb openings and into the hollow plug; bending the ends over the edge ofthe plug; securing the bent over ends by a U- shaped metal clamp;placing a threaded metal ferrule over the open end of the hollow plug;placing a double-ended metal clamping member inside the metal sockets;and securing all the parts by means of a screw which passes through theferrule and the webs and is threaded in the double-ended clamp; and theparts insulated from each other by insulating washers.

LOUIS LUDWIG.

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